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  3. Coastal wetlands of eastern Long Island, New York (ver. 2.0, March 2024)
  4. Mean tidal range of marsh units in eastern Long Island salt marsh complex, New York (ver. 2.0, March 2024)

Mean tidal range of marsh units in eastern Long Island salt marsh complex, New York (ver. 2.0, March 2024)

Dates

Publication Date
Time Period
2020
Revision
2024-03-12

Citation

Welk, R.J., Ackerman, K.V., Defne, Z., and Ganju, N.K., 2020, Coastal wetlands of eastern Long Island, New York (ver. 2.0, March 2024): U.S. Geological Survey data release, https://doi.org/10.5066/P91H426U.

Summary

This data release contains coastal wetland synthesis products for the geographic region of eastern Long Island, New York, including the north and south forks, Gardiners Island, and Fishers Island. Metrics for resiliency, including unvegetated to vegetated ratio (UVVR), marsh elevation, and mean tidal range, are calculated for smaller units delineated from a Digital Elevation Model, providing the spatial variability of physical factors that influence wetland health. Through scientific efforts initiated with the Hurricane Sandy Science Plan, the U.S. Geological Survey has been expanding national assessment of coastal change hazards and forecast products to coastal wetlands with the intent of providing Federal, State, and local managers [...]

Contacts

Point of Contact :
Robert J Welk
Originator :
Robert J Welk, Kate V Ackerman, Zafer Defne, Neil Kamal Ganju
Metadata Contact :
Robert J Welk
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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Revision_History.txt
“Revision history.” 		1.03 KB text/plain
MN_ELI_browse.png
“Mean tidal range of marsh units overlaying ESRI basemap” 		thumbnail 220.85 KB image/png
Shapefile: mu_MN_ELI.zip
mu_MN_ELI.xml
Original FGDC Metadata
View 		25.08 KB
mu_MN_ELI.shp 30.54 MB
mu_MN_ELI.dbf 196.38 KB
mu_MN_ELI.shx 21.6 KB
mu_MN_ELI.CPG 5 Bytes
mu_MN_ELI.prj 425 Bytes
mu_MN_ELI.sbn 26.61 KB
mu_MN_ELI.sbx 1.12 KB
mu_MN_ELI.sld 7.04 KB

Purpose

The purpose of this shapefile is to calculate mean tidal range in each marsh unit. Analysis of mean tidal range is part of a comprehensive assessment to identify the factors and their weights in determining the vulnerability and resiliency of salt marshes. Biomass production is positively correlated with mean tidal range in salt marshes along the Atlantic coast of the United States of America. Recent studies support the idea that enhanced stability of the marshes can be attributed to increased vegetative growth due to increased tidal range. This dataset displays the spatial variation of mean tidal range (i.e. Mean Range of Tides, MN) in the eastern Long Island salt marsh complex. MN was based on the calculated difference in height between mean high water (MHW) and mean low water (MLW) using the VDatum (v3.5) database ( http://vdatum.noaa.gov/ ).
Mean tidal range of marsh units overlaying ESRI basemap
Mean tidal range of marsh units overlaying ESRI basemap

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